Widal reaction

noun

Wi·​dal reaction
variants also Widal's reaction
: a specific reaction consisting in agglutination of typhoid bacilli or other salmonellae when mixed with serum from a patient having typhoid fever or other salmonella infection and constituting a test for the disease

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Cite this Entry

“Widal reaction.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Widal%20reaction. Accessed 1 Dec. 2022.

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